Integrated Services Digital Network (ISDN). Three-Party (3PTY) supplementary service. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.7.1999
Designation standards: ČSN EN 300188-1-V1.2.4
Classification mark: 877039
Catalog number: 55991
Publication date standards: 1.7.1999
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN